Which spiritual & yoga books shall I read?

There are many spiritual books available online. Some of our favourite books are -

 - Bhagavad Gita as it is by Swami Prabhupada

 - The complete works of Swami Vivekananda

Some authentic books on yoga are - Light on Yoga by B.K.S. Iyengar, Heart of Yoga by TKV Desikachar, Yoga for 3 stages of life by Srivatsa Ramaswamy, The Perennial Psychology of the Bhagawad Gita by Swami Rama